GB2190435A - Sintered bearings - Google Patents

Sintered bearings Download PDF

Info

Publication number
GB2190435A
GB2190435A GB08611208A GB8611208A GB2190435A GB 2190435 A GB2190435 A GB 2190435A GB 08611208 A GB08611208 A GB 08611208A GB 8611208 A GB8611208 A GB 8611208A GB 2190435 A GB2190435 A GB 2190435A
Authority
GB
United Kingdom
Prior art keywords
bearing
groove
thrust plate
radially
sintered
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08611208A
Other versions
GB2190435B (en
GB8611208D0 (en
Inventor
Roger Frederick Baines
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Johnson Electric Industrial Manufactory Ltd
Original Assignee
Johnson Electric Industrial Manufactory Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johnson Electric Industrial Manufactory Ltd filed Critical Johnson Electric Industrial Manufactory Ltd
Priority to GB8611208A priority Critical patent/GB2190435B/en
Publication of GB8611208D0 publication Critical patent/GB8611208D0/en
Publication of GB2190435A publication Critical patent/GB2190435A/en
Application granted granted Critical
Publication of GB2190435B publication Critical patent/GB2190435B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/08—Attachment of brasses, bushes or linings to the bearing housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C43/00—Assembling bearings
    • F16C43/02—Assembling sliding-contact bearings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

A sintered cylindrical bearing (10) has a stepped through bore (12) which is of greater diameter at one end and which defines a thrust plate seat intermediate its ends. An annular groove (18) is provided to allow a part of the bearing to be radially inwardly deformed to retain a thrust plate (19) against the thrust plate seat. <IMAGE>

Description

SPECIFICATION Sintered Bearings This invention relates to sintered bearings, and particularly to sintered cylindrical bearings, the term "cylindrical" being used herein to include so-called flanged bearings, but to exclude so-called spherical bearings.
Sintered metal bearings are knwon and are for example described in a catalogue entitled "RingsdorffSintered Metal Bearings" published by Ringsdorff-Werke GmbH, D-5300 Bonn-Bad Godesberg under No. K462/77e.
According to the present invention there is provided a sintered cylindrical bearing having a through bore which is stepped so as to be of greater diameter at one end of the bearing to define an annular radially extending thrust plate seat, and an annular groove in the end face at said one end of the bearing, the groove being provided to allow a part of the bearing disposed radially inwards of the groove to be radially inwardly deformed to retain a thrust plate against said thrust plate seat.
Preferably, the radially innermost wall of the groove is axially outwardly tapered to facilitate the aforesaid deformation.
Thus it is possible to convert an open radial bearing into a ciosed radial and thrust bearing, the advantage of such a bearing over one with an integrally formed thrust cover being that there can be some air leakage around the thrust plate to facilitate shaft assembly.
The invention will now be more particularly described, by way of example, with reference to the accompanying drawings, in which: Figure lisa section taken along a diameter of one embodiment of a sintered bearing according to the invention, and Figure 2 is a section similar to that in Figure 1 but showing the bearing "rivetted" in a thin plate and a thrust plate held in place.
Referring now to the drawings, there is shown therein a cylindrical bearing 10 of sintered metal, such as of sintered iron or sintered bronze with or without additives. The bearing 10 has a radially outwardly extending flange 11 at one end and a through bore 12 which is stepped so as to be of greater diameter at said one end of the bearing to define an annular radially extending thrust plate seat 13.
An annular groove 14 is provided in the end face of the bearing remote from the flange 11. This groove 14 provides for the insertion of an appropriate tool to peen over or otherwise plastically deform a part of the bearing radially outwardly disposed of the groove 14 to "rivet" the bearing in a thin plate 15 as shown in Figure 2. The radially outermost wall 16 of the groove 14 is axially inwardly tapered, such as at an angle of 45" with respect to the axis of the bearing, in order to facilitate the aforesaid deformation. The radially innermost wall 17 of the groove 14 may also have a slight taper as shown.
An annular groove 18 is provided in the end face of the bearing adjacent to the flange 11. This groove 18 provides for the insertion of an appropriate tool to peen over or otherwise plastically deform a part of the bearing radially inwardly disposed of the groove 18 to retain a thrust plate in the form of washer 19 against the seat 13 as shown in Figure 2.
The radially innermost wall of the groove 18 is axially inwardly tapered, such as at an angle of 45" with respect to the axis of the bearing, in order to facilitate the aforesaid deformation. The washer 19 is of metal or other appropriate bearing material.
In the embodiment shown the bearing has a short journal length designated at 20 behind which is a larger diameter pocket 21 to contain lubricating medium.
Such a bearing is mounted as a slidable fit in a hole in the thin plate 15 prior to "rivetting in" and consequently unlike press-fitted cylindrical bearings no bore contraction occurs during fitting.
The bearing 10 is particularly suitable for mounting in thin metal sheet plate end caps of low power electric motors, particularly fractional horsepower permanent magnet direct current motors.
The above embodiment is given by way of example only and it will be apparent to persons skilled in the art that various modifications can be made without departing from the scope of the invention. For example, the invention is not limited to so-called flanged bearings of the type which can be "rivetted in". It can be applied equally well to a press-fittable flanged or non-flange bearing from which the groove 14 can thus be omitted.
1. A sintered cylindrical bearing having a stepped through bore which is of greater diameter at one end and which defines a thrust plate seat intermediate its ends, and an annular groove in that end face of the bearing adjacent to said one end of the bore, the groove being provided to allow a part of the bearing disposed radially inwards of the groove to be radially inwardly deformed to retain a thrust plate against said thrust plate seat.
2. A bearing as claimed in claim 1, wherein a radially inner most wall of the groove is axially outwardly tapered to facilitate the aforesaid deformation.
3. A bearing as claimed in claim 1 or claim 2, wherein the bearing has a radially outwardly extending flange at that end of the bearing adjacent to said one end of the bore and wherein a further annular groove is provided in the other end face of the bearing to allow a part of the bearing disposed radially outwards of the further groove to be radially outwardly deformed.
4. A bearing as claimed in claim 3, wherein a radially outermost wall of the further groove is axially inwardly tapered.
5. A bearing as claimed in any one of the preceding claims, in combination with a thrust plate held against said thrust plate seat by deformation as aforesaid of the part of the bearing disposed radially inwards of the first-mentioned groove.
6. The combination of claim 5, wherein the bore defines a first journal portion and a second larger
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Sintered Bearings This invention relates to sintered bearings, and particularly to sintered cylindrical bearings, the term "cylindrical" being used herein to include so-called flanged bearings, but to exclude so-called spherical bearings. Sintered metal bearings are knwon and are for example described in a catalogue entitled "RingsdorffSintered Metal Bearings" published by Ringsdorff-Werke GmbH, D-5300 Bonn-Bad Godesberg under No. K462/77e. According to the present invention there is provided a sintered cylindrical bearing having a through bore which is stepped so as to be of greater diameter at one end of the bearing to define an annular radially extending thrust plate seat, and an annular groove in the end face at said one end of the bearing, the groove being provided to allow a part of the bearing disposed radially inwards of the groove to be radially inwardly deformed to retain a thrust plate against said thrust plate seat. Preferably, the radially innermost wall of the groove is axially outwardly tapered to facilitate the aforesaid deformation. Thus it is possible to convert an open radial bearing into a ciosed radial and thrust bearing, the advantage of such a bearing over one with an integrally formed thrust cover being that there can be some air leakage around the thrust plate to facilitate shaft assembly. The invention will now be more particularly described, by way of example, with reference to the accompanying drawings, in which: Figure lisa section taken along a diameter of one embodiment of a sintered bearing according to the invention, and Figure 2 is a section similar to that in Figure 1 but showing the bearing "rivetted" in a thin plate and a thrust plate held in place. Referring now to the drawings, there is shown therein a cylindrical bearing 10 of sintered metal, such as of sintered iron or sintered bronze with or without additives. The bearing 10 has a radially outwardly extending flange 11 at one end and a through bore 12 which is stepped so as to be of greater diameter at said one end of the bearing to define an annular radially extending thrust plate seat 13. An annular groove 14 is provided in the end face of the bearing remote from the flange 11. This groove 14 provides for the insertion of an appropriate tool to peen over or otherwise plastically deform a part of the bearing radially outwardly disposed of the groove 14 to "rivet" the bearing in a thin plate 15 as shown in Figure 2. The radially outermost wall 16 of the groove 14 is axially inwardly tapered, such as at an angle of 45" with respect to the axis of the bearing, in order to facilitate the aforesaid deformation. The radially innermost wall 17 of the groove 14 may also have a slight taper as shown. An annular groove 18 is provided in the end face of the bearing adjacent to the flange 11. This groove 18 provides for the insertion of an appropriate tool to peen over or otherwise plastically deform a part of the bearing radially inwardly disposed of the groove 18 to retain a thrust plate in the form of washer 19 against the seat 13 as shown in Figure 2. The radially innermost wall of the groove 18 is axially inwardly tapered, such as at an angle of 45" with respect to the axis of the bearing, in order to facilitate the aforesaid deformation. The washer 19 is of metal or other appropriate bearing material. In the embodiment shown the bearing has a short journal length designated at 20 behind which is a larger diameter pocket 21 to contain lubricating medium. Such a bearing is mounted as a slidable fit in a hole in the thin plate 15 prior to "rivetting in" and consequently unlike press-fitted cylindrical bearings no bore contraction occurs during fitting. The bearing 10 is particularly suitable for mounting in thin metal sheet plate end caps of low power electric motors, particularly fractional horsepower permanent magnet direct current motors. The above embodiment is given by way of example only and it will be apparent to persons skilled in the art that various modifications can be made without departing from the scope of the invention. For example, the invention is not limited to so-called flanged bearings of the type which can be "rivetted in". It can be applied equally well to a press-fittable flanged or non-flange bearing from which the groove 14 can thus be omitted. CLAIMS
1. A sintered cylindrical bearing having a stepped through bore which is of greater diameter at one end and which defines a thrust plate seat intermediate its ends, and an annular groove in that end face of the bearing adjacent to said one end of the bore, the groove being provided to allow a part of the bearing disposed radially inwards of the groove to be radially inwardly deformed to retain a thrust plate against said thrust plate seat.
2. A bearing as claimed in claim 1, wherein a radially inner most wall of the groove is axially outwardly tapered to facilitate the aforesaid deformation.
3. A bearing as claimed in claim 1 or claim 2, wherein the bearing has a radially outwardly extending flange at that end of the bearing adjacent to said one end of the bore and wherein a further annular groove is provided in the other end face of the bearing to allow a part of the bearing disposed radially outwards of the further groove to be radially outwardly deformed.
4. A bearing as claimed in claim 3, wherein a radially outermost wall of the further groove is axially inwardly tapered.
5. A bearing as claimed in any one of the preceding claims, in combination with a thrust plate held against said thrust plate seat by deformation as aforesaid of the part of the bearing disposed radially inwards of the first-mentioned groove.
6. The combination of claim 5, wherein the bore defines a first journal portion and a second larger diameter portion between the first journal portion and the thrust plate for a lubricating medium.
7. An electric motor provided with a bearing according to anyone of the preceding claims.
7. A sintered cylindrical bearing substantially as hereinbefore described with reference to the accompanying drawings.
8. An electric motor provided with a bearing according to anyone of the preceding claims.
(a) Claims 1-8 above have been deleted or textually amended.
(b) New or textually amended claims have been filed as follows:-
1. A sintered cylindrical bearing having a stepped through bore of greater diameter at one end and an annular groove in that end face of the bearing adjacent to said one end of the bore, the through bore defining a thrust plate seat intermediate its ends, a journal portion at its other end and a pocket of larger diameter than the journal portion between the journal portion and the thrust plate seat, and the groove being provided to allow a part of the bearing disposed radially inwards of the groove to be radially inwardly deformed to retain a thrust plate against said thrust plate seat.
2. A bearing as claimed in claim 1, wherein a radially inner most wall of the groove is axially outwardly tapered to facilitate the aforesaid deformation.
3. A bearing as claimed in claim 1 or claim 2, wherein the bearing has a radially outwardly extending flange at that end of the bearing adjacent to said one end of the bore and wherein a further annular groove is provided in the other end face of the bearing to allow a part of the bearing disposed radially outwards of the further groove to be radially outwardly deformed.
4. A bearing as claimed in claim 3, wherein a radially outermost wall of the further groove is axially inwardly tapered.
5. A bearing as claimed in anyone of the preceding claims, in combination with a thrust plate held against said thrust plate seat by deformation as aforesaid of the part of the bearing disposed radially inwards of the first-mentioned groove.
6. A sintered cylindrical bearing substantially as hereinbefore described with reference to the accompanying drawings.
GB8611208A 1986-05-08 1986-05-08 Sintered bearings Expired GB2190435B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8611208A GB2190435B (en) 1986-05-08 1986-05-08 Sintered bearings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8611208A GB2190435B (en) 1986-05-08 1986-05-08 Sintered bearings

Publications (3)

Publication Number Publication Date
GB8611208D0 GB8611208D0 (en) 1986-06-18
GB2190435A true GB2190435A (en) 1987-11-18
GB2190435B GB2190435B (en) 1989-12-06

Family

ID=10597508

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8611208A Expired GB2190435B (en) 1986-05-08 1986-05-08 Sintered bearings

Country Status (1)

Country Link
GB (1) GB2190435B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2647860B1 (en) * 2012-04-05 2023-12-06 Liebherr-Aerospace Lindenberg GmbH Bushing for coupling with a component

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1036014A (en) * 1963-05-15 1966-07-13 Smiths Industries Ltd Improvements in or relating to pivot bearings
GB2159443A (en) * 1984-05-28 1985-12-04 Walterscheid Gmbh Jean Method of making a ball joint

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1036014A (en) * 1963-05-15 1966-07-13 Smiths Industries Ltd Improvements in or relating to pivot bearings
GB2159443A (en) * 1984-05-28 1985-12-04 Walterscheid Gmbh Jean Method of making a ball joint

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2647860B1 (en) * 2012-04-05 2023-12-06 Liebherr-Aerospace Lindenberg GmbH Bushing for coupling with a component

Also Published As

Publication number Publication date
GB2190435B (en) 1989-12-06
GB8611208D0 (en) 1986-06-18

Similar Documents

Publication Publication Date Title
EP0269264B1 (en) Ferrofluid seal for a stationary shaft and a rotating hub
US5957461A (en) Radial lip shaft seal
US6204577B1 (en) Method and apparatus for space-saving installation of a starter-alternator
US6091174A (en) Electric motor
EP1378983A2 (en) Fan motor
US4295268A (en) Method of assembling an electric motor
ZA200001985B (en) Improved shaft seal assembly.
US5130592A (en) Sliding rotor motor
EP2629403A2 (en) Improved bearing for an electric actuator motor
US5677584A (en) Bearing assembly for dynamoelectric machines
JP2003504581A (en) Bearing system for rotating shaft
US5218252A (en) Dynamoelectric machines with stator positioning
EP0830724B1 (en) Rear motor bearing for worm gear drive motors
US5770904A (en) Electric motor
KR100192859B1 (en) Vehicular charging generator
US5166569A (en) Rotor containment assembly for dynamoelectric machines
GB2190435A (en) Sintered bearings
EP0731285A3 (en) Assembly of a one-way clutch and a bearing
US4874973A (en) Method and arrangement for securing a pulley to a rotor in an electromagnetic clutch
US6817431B1 (en) Suspension for a subassembly that produces, receives and/ or transmits torque in the drive train of a motor vehicle
US5139348A (en) Bearings
US4634298A (en) Self-aligning bearing retention system
WO1993015329A1 (en) Bearing split outer ring and method of assembly
CA2185482A1 (en) Pump with improved bearing arrangement for axial position control
US4641979A (en) Bearing system for fractional horsepower electric motors

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee